Yes, you have a point that there are basic tenets of the Star Wars films that assume connections with 'reality': objects are called similar things in that universe as they are in ours; characters with names like Luke whose origins are biblical; human beings existing as one of the primary 'races', so on and so forth. But there is a huge difference between representing a common language among multiple cultures in a film universe (contrasted, of course, with a healthy helping of other languages) with the one of the assumed audience and placing anachronistic and otherwise completely ridiculous references to very specific aspects of reality into the film. What does that accomplish? It takes you completely out of being immersed in the film's universe. It is the stuff of sci-fi parodies See: Space Balls truck stop scene, almost anything in the Space Quest adventure series (particularly Monolith burgers), etc...
I realize that Lucas is not known for his attention to 'suspension of disbelief', so why not throw in a scene with Anakin and Palpatine discussing Darth Plagueus at the nearest McCoruscant burger joint? Or perhaps Obi Wan having an iced latte at Mustafarbucks to 'cool down' after that climactic final battle? Seriously, are you joking?